Brazing compound.



UNITED STATES Patented January 17, 1905.

PATENT OFFICE.

FRANK A. REYNOLDS, OF LEWISTON, MAIN E, ASSIGNOR TQSTEPHEN H.

MANNING, OF LEWISTON, MAINE, AND

NEW YORK, N. Y.

HERSOHELL PARKER, OF

BRAZING COMPOUND.

SPECIFICATION forming part of Letters Patent No. 780,128, dated January17, 1.905.

, Application filed August 5, 1904. Serial No. 219,585.

To all whom it may concern.-

Be it known that I, FRANK A. REYNOLDS, of Lewiston, in the county ofAndroscoggin and State of Maine. have invented a new and ImprovedBrazing Compound, of which the following is a full, clear, and exactdescription.

My invention relates to improvements in brazing iron; and the object ofmy invention is to produce a simple composition by means of whichcast-iron or other iron can be cheaply, easily, and strongly welded orunited.

My invention is based on the well-known reducing properties ofaluminium, and I use this in some form as a means for absorbing theoxygen in the parts to be mended. and for forming an alloy which servesas a very perfect spelter.

In carrying out my invention in one simple manner I take aluminiumpowder and mingle it with about equal parts of carbon. These materials Imix with oil or water, so as to form a paste. This paste canbeused forpainting the ends of the parts to be united, after which these ends areplaced in the fire and heated to a red heat. After. this borax and theordinary brazing compound or spelter can be melted on over the joint andallowed to cool. These parts are then filed off, as

usual. The aluminium has'so great an afiinity for oxygen that it reducesall other oxids present and leaves an absolutely metallic surface at theparts which are to be united, so that there is nothing to prevent aperfect union.

For general purposes I prefer to use the aluminium with other compoundsin stick form, as it can be very conveniently used in this way. Incarrying out this idea I take the ordinary spelter or brazing mixture, aquantity of aluminium powder, and some oxid of iron, together with alittle copper to toughen the material. This mixture is-then heated up toa red heat, when it melts'down and forms an alloy. This action isgreatly facilitated by the presence of the aluminium and oxid of iron.The aluminium takes the oxygen from the Patent' oxid of iron, thusproducing a great amount of extra heat, and so the mixture is readilyfused and an alloy is produced composed of the original spelter, iron,and a slight excess of aluminium and copper. This alloy in the form ofsticks or other form is then applied directly to the heated ends of theparts to be brazed, which require no previous preparation. The action ofthe brazing is probably due to the presence of the iron in the alloy. asit is well known that this has an afiinity for the iron ends to bebrazed, and also to the reducing and solvent action of the aluminium inthe mixture described. Informing this al- 60 'loy about equal parts ofspelter, oxid of'iron, aluminium,'and copper are used; but theseproportions can be varied to meet varying conditions. 2 7

It will be noticed thatiwhile the composi tions which I have describedvary somewhat still the feature of both is the aluminium, and

comprising spelter, copper, aluminium andan oxid combinedas stated. i Y

3. The herein-described brazing compound, comprising aluminium, spelter,oxidtof iron and copper, in substantially the proportions stated. v

4. The herein-described brazing compound,

consisting of an alloy formed of spelter, iron oxid, aluminium andcopper,'the dients being combined and melted.

(FRA K A..aE No i)s.

said ingre- Witnesses: v E. P. DAVIS, W. H. PUTNAM,

It is hereby certified that Letters'Patent No. 780,128, granted January17, 1905, upon the appiication of Frank A. Reynolds, of Lewiston, Maine,for an improvement in Brazing Compounds, was erroneously issued toStephen H; Manning and Herschel]. G. Parker as owners of the entireinterest, whereas said Letters Patent should have been issued to saidFrank A. Reynolds, Stephen H. Manning and Herschel C. I Parker, jointly,the three being joint owners of said invention as shown by the record ofassignments in this ofiice; and that the given name of thelast-mentioned assiguee should have been spelled Herschel instead ofHerschell; and that the said Letters Patent should be read with thesecorrections therein that the same may conform to the record of the casein the Patent Ofiice.

Signed and sealed this 31st day of January, A. D., 1905.

F. I. ALLEN,

[emu] Cmnmise'ioner of Patents.

